Re: %a format in tests-ulc*.c

[Gisle Vanem]

Paul Eggert wrote:

> On 04/19/2017 05:13 AM, Gisle Vanem wrote:
> > With "%.3a %d", I do get the expected "0x1.922p+1 33".
> > So are these tests somewhat gcc-centric or what?
>
> Yes. It looks to me like MSVC-2015 is right and glibc is wrong, at least in the 
> sense of acting like standard printf.

It seems strange there should be a difference in output since
MSVC internal *printf() seems not involved. Does this perhaps has
something to do with 'BEGIN_LONG_DOUBLE_ROUNDING()' used in
printf-frexp.c?

This macro is effective for gcc only using inline assembly.
It could be done using '_controlfp()' (or '_controlfp_s()')
for MSVC too AFAICS.

--
--gv